Adding an API Gateway External Port

Field	Description
API Gateway external listener configuration. Provide the following details to configure the HTTP listener set up.
External port	Specifies the port number you want to use for the external port. Use a number that is not already in use. This is the port that clients connect to through your outer firewall.
Alias	Specifies an alias for the port. An alias must be between 1 and 255 characters in length and include one or more of the following: letters (a -z, A-Z), numbers (0-9), underscore (_), period (.), and hyphen (-).
Description (optional)	A description of the port.
Protocol	Specifies the protocol to use for this port (HTTP or HTTPS). If you select HTTPS, additional security and credential boxes appear for which you have to provide the required values.
Bind address (optional)	Specifies the IP address to which to bind this port. Specify a bind address if your machine has multiple IP addresses and you want the port to use this specific address. If you do not specify a bind address, API Gateway picks one for you.
Backlog	Specifies the number of requests that can remain in the queue for an enabled port before API Gateway begins rejecting requests. The default is 200. The maximum value is 65535.
Keep alive timeout	Specifies when to close the connection if the server has not received a request from the client within this timeout value (in milliseconds) or when to close the connection if the client has explicitly placed a close request with the server. The default value is 20000ms.
Private threadpool configuration. Specifies whether to create a private thread pool for this port or use the common thread pool.
Enable	Select to enable the private threadpool configuration for this port.
Threadpool min	Specifies the minimum number of threads for this private threadpool. The default value is 1.
Threadpool max	Specifies the maximum number of threads for this private thread pool. The default value is 5.
Thread priority	Specifies the Java thread priority. The default value is 5.
Security configuration. Provide the following details to configure security parameters.
Client authentication	For the external port, specify the type of client authentication required. Select one of the following: Username/Password . API Gateway does not request client certificates. The server looks for user and password information in the header of requests coming from an external client. Digest. API Gateway uses password digest authentication. API Gateway looks for password digest information in the header of requests coming from an external client. Request Kerberos Ticket. API Gateway looks for a Kerberos ticket in the HTTP Authorization header using the Negotiate authentication scheme. If it does not find the ticket, API Gateway uses user name and password for basic authentication. If the client does not provide any authentication information, API Gateway returns an HTTP WWW-Authenticate header with negotiate scheme to the client requesting for authentication information. If the client provides the required authentication information, API Gateway verifies and validates the request. Require Kerberos Ticket. API Gateway looks for a Kerberos ticket in the HTTP Authorization header using the Negotiate authentication scheme. If it does not find the ticket, API Gateway fails the authentication. If the client does not provide any authentication information, API Gateway returns an HTTP WWW-Authenticate header with negotiate scheme to the client requesting for authentication information. If the client provides the required authentication information, API Gateway verifies and validates the request. You have to enable Kerberos by providing the following Kerberos properties with details that are used for handling service requests that come with a Kerberos ticket: JAAS context. Specify the custom JAAS context used for Kerberos authentication. Principal. Specify the name of the principal to use for Kerberos authentication. Principal password. Specify the password for the principal that is used to authenticate the principal to the KDC. Retype principal password. Retype the principal password. Service principal name. Specify the name of the principal used with the service that the Kerberos client wants to access. API Gateway supports the username format for Service Principal Names (SPNs). This format represents the principal name as a named user defined in the LDAP or central user directory used for authentication to the KDC.
API Gateway registration listener configuration . Provide the following details to configure listener specific credentials.
Registration port	Specifies the number you want to use for the registration port. Use a number that is not already in use. It is best not to use a standard port such as 80 (the standard port for HTTP) or 443 (the standard port for HTTPS) because the external firewall allows access to those ports from the outside world. You can add multiple registration ports by clicking +Add.
Alias	Specifies an alias for the port. An alias must be between 1 and 255 characters in length and include one or more of the following: leers (a -z, A-Z), numbers (0-9), underscore (_), period (.), and hyphen (-).
Description (optional)	A description of the port.
Protocol	Specifies the protocol to use for this port (HTTP or HTTPS). If you select HTTPS, additional security and credential boxes appear for which you have to provide the required values.
Bind address (optional)	Specifies the IP address to which to bind this port. Specify a bind address if your machine has multiple IP addresses and you want the port to use this specific address. If you do not specify a bind address, API Gateway picks one for you.
Security configuration	For the registration port specify the type of client authentication required. Username/Password - The server looks for user and password information from the Internal Server.